the number of prime numbers (Pi) up to 1 billion to give an idea :
1-10 4
1-100 25
1-1.000 168
1-10.000 1.229
1-100.000 9.592
1-1.000.000 78.498
1-10.000.000 664.579
1-100.000.000 5.761.455
1-1.000.000.000 50.847.534
1-100 25
1-1.000 168
1-10.000 1.229
1-100.000 9.592
1-1.000.000 78.498
1-10.000.000 664.579
1-100.000.000 5.761.455
1-1.000.000.000 50.847.534
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